Herman Miller Aeron Chair Highly Adjustable with Lumbar Support Pad with C7 Hard Floor Casters - Medium Size (B) Graphite Dark Frame, Classic Dark Carbon Pellicle Mesh Home Office Desk Task Chair Genuine Authorized Herman Miller Retailer and Service Center - 12 Year Factory Warranty is INCLUDED! Genuine Highly Adjustable Aeron with Lumbar Support Pad with C7 Hard Floor Casters - Medium Size B - Graphite Frame Adjustable Padded Arms, Forward Tilt, Tilt Limiter The Aeron chair by Herman Miller is, simply put, the best ergonomic chair you can buy. The 12-Year Warranty covers everything that makes a Herman Miller Office Chair--including casters, tilts, pneumatic cylinders, and all moving mechanisms. IN STOCK FOR IMMEDIATE UPS GROUND SHIPPING! USA SALES ONLY. No International Shipping